Make arg parser return growable list of rest arguments.

utils/pub/pub.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 /// The main entrypoint for the pub command line application.
 library pub;
 
 import 'dart:async';
 import 'dart:io';
 import 'dart:math';
@@ skipping 209 matching lines @@
   /// Override this to define command-specific options. The results will be made
   /// available in [commandOptions].
   ArgParser get commandParser => new ArgParser();
 
   void run(SystemCache cache_, ArgResults globalOptions_,
       List<String> commandArgs) {
     cache = cache_;
     globalOptions = globalOptions_;
 
     try {
-     commandOptions = commandParser.parse(commandArgs);
+      commandOptions = commandParser.parse(commandArgs);
     } on FormatException catch (e) {
       log.error(e.message);
       log.error('Use "pub help" for more information.');
       exit(exit_codes.USAGE);
     }
 
     handleError(error, trace) {
       // This is basically the top-level exception handler so that we don't
       // spew a stack trace on our users.
       var message;
@@ skipping 77 matching lines @@
     if (exception is HttpException || exception is HttpParserException ||
         exception is SocketIOException || exception is PubHttpException) {
       return exit_codes.UNAVAILABLE;
     } else if (exception is FormatException) {
       return exit_codes.DATA;
     } else {
       return 1;
     }
   }
 }